obama, first lady michelle obama, and the white house staff gathered on the south lawn of the white house for a moment of silence to honor the victims of the 9/11 terrorist attacks. [bell rings] [playing "taps"] >> and the pentagon held its own memorial service on tuesday. president obama, defense secretary leon panetta, and joint chiefs of staff martin dempsey took part in the ceremony, honoring those injured in the attack. >> good morning. thank you for being here. we offer a special welcome to the family and friends of those we lost 11 years ago today. one of them was the chief warrant officer. his bench was seventh in from the far right. he served as a marine in vietnam, flying helicopters. joined the army national guard as a medac pilot. he was loved by his students and moved by his deep commitment to them. one student said, he opened up my eyes and by heart to the world. many others became teachers, nurses, firefighters. bill retired from the classroom and return to serve in the pentagon. there is no doubt he lost his life that morning because he stops to help somebody. there

the plane hit the first trade center. >> president obama and first lady michelle obama will be marking the moments on the south lawn. >> on this anniversary of the 9/11 attacks we pause now to remember that moment when the first plane hit the world trade center. >> it was so important health wise to remind women, you know, check your expiration date because it's a health risk. >> that was kris jenner of the kardashian family. c's "today" show not pausing for that moment of silence defending itself the next day saying it's not something we do. finally the president giving this statement to "the new york times." we made an editorial call resulting in the september 11 moment of silence not being seen. while we dedicated a substantial amount of airtime to anniversary events, we still touched a nerve with many of your viewers, and for that we apologize. >> i don't know. these things do not have the same resonance. december 1 1rks 1941, we don't all stop on -- >> to remember. >> pearl harbor day and remember it. and we used to, right? i don't know in history at what point that stopped but th